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1.56 Semi Tiav Xiav Hlais Bifocal Yees Duab Grey optical lo ntsiab muag
Nyob rau hauv tshav ntuj, cov xim ntawm lub lens yuav tsaus dua thiab lub teeb xa hluav taws xob txo qis thaum nws yog irradiated los ntawm ultraviolet thiab luv-yoj pom lub teeb.Nyob rau hauv tsev los yog tsaus lens lub teeb transmittance nce, ploj rov qab mus rau qhov kaj.Lub photochromism ntawm lo ntsiab muag yog tsis siv neeg thiab thim rov qab.Cov iav hloov xim tuaj yeem kho qhov kev xa tawm los ntawm lub lens xim hloov, kom tib neeg lub qhov muag tuaj yeem hloov pauv ntawm ib puag ncig lub teeb, txo qhov pom kev qaug zog, thiab tiv thaiv lub qhov muag.
